"Amid mounting frustration over taxation and banking problems, small but growing numbers of overseas Americans are taking the weighty step of renouncing their citizenship.
"American expats have long complained that the United States is the only industrialized country to tax citizens on income earned abroad, even when they are taxed in their country of residence, though they are allowed to exclude their first $91,400 in foreign-earned income.
"Yet the notion of double taxation — and of future tax obligations for her children, who will receive few U.S. services — finally pushed her to renounce, she said."
full story Brian Knowlton: More American Expatriates Give Up Citizenship
Well, stop luring them over
Well, stop luring them over to New Zealand blindly - give them the bad bits first to let them make an informed decision.